I understand what you are saying, but I would use the word "popular" instead of "successful". Scientology really can't be called "successful" in this context unless it provides such people with self-esteem, a good education, a feeling of worth, etc. But I would grant that the people you describe just might find Scientology alluring.
I'd probably use the words "getting agreement" or "reality" as defined by hubbard but not really "reality" but hubbard used the word reality as agreement, which ain't true, after one has been thru the whole gamut of scientology. LOL